[scilab-Users] [SPAM] how to quickly transform a string in a double when my HDD is full?

[Allan CORNET]

Hi,

 

Have you try csv_stringtodouble or csv_textscan ?

 

stacksize("max")

N=10000;

paf = string(rand(N,1));

 

tic(),R = csv_stringtodouble(paf);toc()

 

Allan

 

De : Adrien Vogt-Schilb [mailto:vogt at centre-cired.fr] 
Envoyé : mercredi 29 février 2012 11:33
À : users at lists.scilab.org
Objet : [scilab-Users] [SPAM] how to quickly transform a string in a double
when my HDD is full?

 

hi

What is the fastest way to transform a column of stringed numbers in
numbers?

It has come to this: I actually write my column in an HDD and then read it
again. 

Using the magical csv_readwrite toolblox is paradoxically faster than evstr.
Here goes a fast benchmark:


stacksize("max")

N=10000;

paf = string(rand(N,1));

tic()
hop = evstr(paf)
disp("evstr method "+string(toc()))

tic()
csv_write(paf,TMPDIR+filesep()+"paf")
hop=csv_read(TMPDIR+filesep()+"paf")
disp("using HDD "+string(toc()))

tic()
hop = eval(paf)
disp("eval method "+string(toc()))

 
 evstr method 1.328   
 
 using HDD 0.078   
 
 eval method 2.094   


logical conclusion: Allan, can you tweak csv_readwrite so it writes to and
reads from the RAM ? it would be even faster !

-- 
Adrien Vogt-Schilb (Cired) 
Tel: (+33) 1 43 94 73 77

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20120229/75242396/attachment.htm>